Pivot pin adjusting means for center-hung doors



F. J. TYLMAN Oct. 11, 1960 PIVOT PIN ADJUSTING MEANS FOR CENTER-HUNGDOORS Filed Dec. 17, 1956 FlGl FIG. 3

INVENTOR: FLORIAN J, TYLMAN ATT'YS United States Patent I "2 (Chm- 176)r This: invention relates to. pivot-pin adjusting devices for use withcenter-hung .doors. Of recent years metal-framed glass doors havebecomepvery'much in vogue at the entrances and between sections of allkinds of buildings where there is a constant movement of people intoandout of and through "the: building. In order to enhance v theattractiveness of such doors pivot mountings and doorclosing and check'mechanisms have been devised to permit their location within thesurrounding framework intermediate the planes of the door faces.

For example, doors are hinged for swinging on vertically-alined pivotpins with the mounting for the lower pin located in the floor below thesurface thereof and the mounting for the upper pivot pin located in thedoorway lintel for shifting into and out of a socket located in the doorframe intermediate the faces thereof and adjacent one vertical edge ofthe door. A door so mounted generally is designated as a center-hungdoor.

The bottom pivot pin is usually fixed in its mounting and extends upabove the face of the floor. The top pivot pin is mounted for verticaladjustment in its mounting between a completely-retracted andpredeterminedlyextended position. This permits setting of the door on'the lower pivot pin and then positioning the door to aline the socketin the top cross bar of the door frame with the pivot pin in the lintelso that the top pivot pin may be shifted into the door-frame socket andthereby lock the door in place for its normal swinging function.

When a door of this kind is to be removed for any reason, it becomes avery simple operationmerely the retraction of the upper pivot pin intoits mounting; and various mechanisms have been developed and are in usefor effecting this reciprocable adjustment of the upper pivot pin.

The main objects of this invention are to provide an improved form ofpivot-pin adjusting device for elfecting the axial shifting of the toppivot pin in its mounting; and to provide an improved pivot-pinadjusting device of this kind which is the acme of simplicity,producible at the very minimum of expenses, and faultless in itsfunctioning.

In the embodiment of this improved pivot-pin adjust-- ing mechanismshown in the accompanying drawings;

Figure 1 is a fragmentary, vertical, sectional elevation of contiguousportions of a door frame and the door-way lintel, showing a toppivot-pin and an improved adjusting mechanism constructed in accordancewith this invention, the mechanism being shown positioned with the pivotpin set into the door-frame socket for normally locking the door inswinging position;

Fig. 2 is the same view except that the adjusting mechanism is shownpositioned to retract the pivot pin to permit placement or removal ofthe door; and

Figs. 3 and 4 are transverse, sectional views taken on the planes of thelines 3--3 and 4'-4, respectively, of Fig. 1.

The essential concept of this invention involves an v of are known inthe art.

. z axially-shiftable pivot pin the opposite reciprocation of which iseffected bya lever actuated by a threaded element connected thereto by a'ball-and-socket joint.

A pivot pin adjusting device, embodying the foregoing concept, comprisesa mounting 5 slidably supporting a pivot pin 6 the opposite axialmovement of which is 'elfectedby'a lever 7' actuated by a threadedelement 8.

. The mounting 5 is in.the .form of a' plate 9 whereon is secured a pinsleeve 10and a 'lever-fulcrum bracket 11. The plate is shaped anddimensioned to' be set or mortised into the doorway lintel 12 andsecured in place 'by screws 13 flush with theunder face of the lintelwhich is opposed to theupper cross-bar 14 ofa framed door 15.

' I Thejslee've 10 is set in the plate adjacent one end wherein the pin6 isslidably retained and reciprocated .by the lever 7, as will bedescribed presently. Along one f-side of the sleeve 10 is alongitudinal-peripheral slot 16 'through' which one end of the lever 7extends to engage The pivot pin 6 is a "short piecev of "rod dimensionedthe pin 6. The bracket" 11, which is U-shape, is set in and secured ,tothe plate'9 remote from the sleeve 11.

fo'r'fre'e'and easy movement in the sleeve 10 to be shifted into and outof a socket 17 formed at one end of a plate member 17.1 which is setinto the upper doorframe cross-bar 14. As shown, the pin 6 is formedwith a recess 18 for the reception of the small end of the lever 7.

' The lever 7 is an elongated piece of metal preferably a simple flatplate stamping, tapered from one end to the other and of rectangularcross-section, fulcrumed adjacent the larger end, by a pin 19, to thebracket 11 and constitutes what is commonly referred to as awalking-beam. The lever fulcrum19 thus disposes the lever 7 radially ofthe pin 6 so that the small end 20 extends into the pin recess 18 and sothat the lever is swingable in the plane of the pin axis. The rear orlarger end of the lever 7 is formed with a circular aperture 21whichopens laterally at the lower edge of the lever to provide a socket.As shown the axis of the aperture 21 is normal to the plane of the lever7 and the opening 21.1 is of considerably less width thanthe diameter ofthe aperture.

The threaded adjusting element 8 is a common screw stud threaded intothe plate 9 in axial alinement with the center of the lever socket 21when the lever is in substantially horizontal position. At its upper endthe screw stud 8 mounts an integral ball 22 which fits in the leversocket 21 to form a conventional ball-and-socket joint between the lever7 and element 8. The ball 22 is connected to the stud 8, axiallythereof, by a short neck 23 and the ball is loose enough in the socket21 to permit limited movement of the lever about the pin 19 withoutbinding between the ball and the socket walls.

The ball-and-socket connection of the lever 7 and screw element 8, beingpositioned closely adjacent the lever fulcrum outwardly thereof, makespossible a multiplied movement of the apposite end of the lever, andhence a relatively great axial movement of the pin 6, fora very smallaxial movement of the element 8.

The door 15, as previously noted, is a metal-framed glass panel in thetop frame member 14 of which is located the plate member 17.1 carryingthe pin socket 17. As shown, a ball bearing 23 is seated in the platemember 17.1 concentrically of .the socket 17 to embrace the pin 6, whenit is extended into the socket and thereby provides a nearlyfrictionless top support for the swinging door. The retractible pivotpin with the lever adjusting means therefor is also known as a walkingbeam pivot and several forms and arrangements there- In almost all caseshowever the means for operating the lever to extend or retract the pivotpin is of a comparatively costly form for both manufacture and assemblyand the adjustment action is stifl and, unhandy to manipulate. "Thepresent invention is intended to cure these difiiculties and provide awalkling-beam.,pivotthatispsmooth actingvand. easilyoperated, ofextremely simple constructionthat is easily manufactured and assembled,and which'can 'bemade at a considerable saving, in cost over any of theprior arrange- .ments.

Although but one specific embodiment of this invention is herein shownand described, it will be understood that details of theconstructionlshown may be altered or omitted without departing f1'0m.the.$PlIit-Qf,the invention as defined .by thefollowing claims.

I claim: 1. A door hingepivot pinuadjustingrdevice comprising, amounting, a door hingepivotpincarried by said .saidballds,greater.than,-the thickness of the said flat lever portion andwherein"the "ball, neck and adjusting screw are integral.

References Cited inv the file of. this patent UNITED; STATES PATENTS695,526 Bardsley Mar. 18, 1902 781,069 Hewitt Jan. 31, 1905 1,126,606Wo1f, Janfi26, 1915 1,989,116 Strauss Jan. 25, 1936 2,493,841 ThreewitJan-10,1950 2,532,676 Shaieb 'Dec. 5, 195,0

, FOREIGN PATENTS 6,768 Great Britain Mar. 19, 1902

